Protoconch paucispiral, covered with numerous minute granules. Transition with the teleoconch prosocline. « First 3-4 teleoconch whorls’ microsculpture of dense growth lines, subsequent whorl with 10-11 inconspicuous axial ribs attenuating by the suture, body whorl only with prosocline and dense growth lines reaching the aperture. Spiral sculpture of dense pitted lines more prominent on the body whorl. […] Shell colour of fresh specimens purple-brown on the protoconch and the first 3-4 teleoconch whorls, turning off white on the body whorl, and purple-brown peristomium. Colour pattern of chestnut-brown elongated spots arranged in four to five spiral rows on the body whorl. Periostracum and operculum straw-yellow. Animal head-foot background colour translucent white with snow-white speckles extending to long cephalic tentacles. » – Manousis & al.: “New records of Rissoidae (Mollusca: Gastropoda) for the Hellenic Seas with the description of Rissoa electrae n. sp.”, Xenophora Taxonomy vol. 26, Paris 2019, p.4.
 
There are no traces of purple on the peristomium, while they exist constantly in splendida, variabilis or violacea. The species differs from variabilis also by the colour of the animal: white tentacles and pale body in electrae, while in variabilis there are yellow tentacles and a cream-coloured body with bands of brown between the tentacles and above the muzzle; for the same reason, the species differs from similis or splendida, whose animals are bearing brown stripes. Finally, the shell of electrae differs from those of lilacina or violacea by the smaller size: « nearly by half ».